Insulation Calculators — Free Cost & Material Estimators
Estimate insulation costs for spray foam, blown-in, fiberglass, and more. Our calculators help you determine the right amount of insulation and budget for materials and professional installation.
Spray Foam Insulation Cost Calculator
Estimate spray foam insulation costs by area, foam type, and thickness. Get instant open-cell and closed-cell pricing with R-value calculations.
Blow-in Insulation Cost Calculator
Estimate blow-in insulation costs for fiberglass, cellulose, and mineral wool. Get pricing by area, R-value target, and application area with bag counts.
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Frequently Asked Questions
What type of insulation is most cost-effective? +
Blown-in fiberglass and cellulose insulation are generally the most cost-effective options at $0.50-$1.50 per square foot installed. Spray foam costs more ($1.50-$5+/sq ft) but provides higher R-value per inch and acts as an air barrier.
How much insulation do I need? +
The amount depends on your climate zone and where you're insulating. The DOE recommends R-38 to R-60 for attics and R-13 to R-23 for walls in most US climate zones. Our calculators factor in your specific requirements.